Calculate the Standard Enthalpy of Formation of Potassium Chloride Given

question 76

Essay

Calculate the standard enthalpy of formation of potassium chloride given the following enthalpy data.
$$\begin{array} { l l } \mathrm { K } ( \mathrm { s } ) \rightarrow \mathrm { K } ( \mathrm { g } ) & + 89 \mathrm {~kJ} \cdot \mathrm { mol } ^ { - 1 } \\\mathrm {~K} ( \mathrm {~g} ) \rightarrow \mathrm { K } ^ { + } ( \mathrm { g } ) + \mathrm { e } ^ { - } & + 418 \mathrm {~kJ} \cdot \mathrm { mol } ^ { - 1 } \\1 / 2 \mathrm { Cl } _ { 2 } ( \mathrm {~g} ) \rightarrow \mathrm { Cl } ( \mathrm { g } ) & + 122 \mathrm {~kJ} \cdot \mathrm { mol } ^ { - 1 } \\\mathrm { Cl } ( \mathrm { g } ) \mathrm { e } ^ { - } \rightarrow \mathrm { Cl } ^ { - } ( \mathrm { g } ) & - 349 \mathrm {~kJ} \cdot \mathrm { mol } ^ { - 1 } \\\mathrm { KCl } ( \mathrm { s } ) \rightarrow \mathrm { K } ^ { + } ( \mathrm { g } ) + \mathrm { Cl } ^ { - } ( \mathrm { g } ) & + 717 \mathrm {~kJ} \cdot \mathrm { mol } ^ { - 1 }\end{array}$$

Examine dropout rates among different demographics.

Identify strategies for creating an environment that promotes school success.

Understand grade inflation and its impact on student achievement.

Analyze the effectiveness of Head Start programs.

---

Definitions:

Inventory

The raw materials, work-in-progress goods, and finished goods that are considered to be the portion of a business's assets that are ready or will be ready for sale.

Cost of Goods Sold

The direct costs attributable to the production of the goods sold by a company, including materials and labor expenses.

Sales

The total amount of goods or services sold by a company within a specific period, often used as an indicator of a company's performance.

Inventory Turnover Rate

A ratio showing how many times a company's inventory is sold and replaced over a period.